Support adding individual regions in libvhost-user
authorRaphael Norwitz <raphael.norwitz@nutanix.com>
Thu, 21 May 2020 05:00:52 +0000 (05:00 +0000)
committerMichael S. Tsirkin <mst@redhat.com>
Fri, 12 Jun 2020 14:17:06 +0000 (10:17 -0400)
commitec94c8e621de96c50c2d381c8c9ec94f5beec7c1
tree3600da2ea82557244b2183a6dd93831e7cda6009
parent6fb2e173d20c9bbb5466183d33a3ad7dcd0375fa
Support adding individual regions in libvhost-user

When the VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS is enabled, qemu will
transmit memory regions to a backend individually using the new message
VHOST_USER_ADD_MEM_REG. With this change vhost-user backends built with
libvhost-user can now map in new memory regions when VHOST_USER_ADD_MEM_REG
messages are received.

Qemu only sends VHOST_USER_ADD_MEM_REG messages when the
VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS feature is negotiated, and
since it is not yet supported in libvhost-user, this new functionality
is not yet used.

Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <1588533678-23450-9-git-send-email-raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
contrib/libvhost-user/libvhost-user.c
contrib/libvhost-user/libvhost-user.h